Other information recorded included factors that could influence pain experienced and pain pill use. For pain experienced, the influence of the following factors were assessed: sex, age, type of surgery, nervousness, sedation use, smoking status, anticipated pain, nutritional supplement use and pain pill use. For pain pill use, the influence of the following factors were assessed: sex, age, type of surgery, nervousness, sedation use, smoking status, anticipated pain, nutritional supplement use and pain experienced. These factors were analyzed using regression analyses.